Pustules on a dairymaid's arm infected with cow-pox

Pustules on a dairymaid's arm infected with cow-pox. From Edward Jenner Inquiry into the Causes and Effects of the Variolae Vaccinae, London, 1798. Jenner proved that infection with Cowpox could provide immunity to the far more dangerous Smallpox

1798 Causes Cowpox Dairymaids Immunisation Immunity Infect Infected Infection Inquiry Jenner Proved Provide Pustules Smallpox Vaccination

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